.container {
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-size: 40px;
}

.nav-bar {
    background-color: #1976D2;
}

.btn {
    width: 50%;
    font-size: 16px;
    radius: 60;
    background-color: #1976D2;
    text-color: white;
    margin: 1%;
}